Text Appearing Just before Image:arranged in series and connected so as to be of oppositepolarity and having fields, indicates for alternately thrilling saidfields, and indicates connected with two generators for absorb-ing the varying current of each polarity produced throughout theoperation of o,ne or the other of stated generators. 948,228. Centrifugal Pump. Ferdinand W. Krogh. SanFrancisco, Cal. In a centrifugal pump, an impeller havingprotection on the discharge edge thereof, said protectionconsisting of a metal ring detachably secured to mentioned dis-charge edge of the impeller, in mixture with a stationary

Text Appearing Following Image:casing having a circumferential rib on the inside of the very same,and said rib getting protection on its edge, mentioned protectionconsisting of a metal ring detachably secured to the edgeof the rib for the goal specified. 148 JOURNAL OF Electricity. Power AND GAS [Vol. XXIV—No. 7 Journal of Electrical energy Energy AND GAS tiWr/ PUBLISHED WEEKLY BY THE Technical Publishing Organization E, B, Sturdy, President A.. H. Halloran, Vice President and Manaeins Editor C. L. Cory. Secretary. DIRECTORSR. J. D.wis A. M. Hunt A. H. Halloran C. L. Cory E. B. Sturdy 604 Mission Street, San Francisco Telephone KEARNY 918 TERMS OF SUBSCKIPTION United States. Cuba and Mexico per year, ,50 Dominion of Canada three.50 Other Foreign Countries inside the Postal Union five.00 Single Copies. Present Month each .ten Single Copies, prior to Existing Month .25 NOTICE TO ADVERTISERS Alterations of advertising copy need to reach this workplace ten days in advance ofdate of concern. New ads will be accepted up to noon of Monday dated

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Text Appearing Prior to Image:contact members slidably supported on the conductors ofone series, other speak to members carried by mentioned first namedcontact member, and signifies on stated other series of con-ductors for securing stated last named make contact with members thereto. 948,292. Multistage Centrifugal Pump. Arthur Giesler,Dayton, Ohio, assignor to The Piatt Iron Functions Co., Dayton,Ohio. In a multi-stage centrifugal pump, two impellers ar-

Text Appearing Following Image:ranged with their inlets facing in opposite directions, pas-sageways adapted to conduct the fluid from one impeller tothe other, and signifies mounted at the intermediate inlet of thelast impeller for balancing the thrust of the pump. 947,781. Apparatus for Alternating the Polarity of Cur-rent in Electric Circuits. Garrison Babcock, Rochester, N. Y.,assignor to Telechrometer Co., Rochester, N. Y. An appa-ratus of the character described, comprising two generators

Note About ImagesPlease note that these pictures are extracted from scanned page images that could have been digitally enhanced for readability – coloration and look of these illustrations may possibly not perfectly resemble the original operate.